Stop Lamp Does Not Light - Sakai R2-4 Shop Manual

2-6-7. Stop lamp does not light

Reference Fig.: 2-6-1
Check point
1. Each Bulb
2. Foot Brake Switch
3. Stop Lamp Relay
4. Harness Connecting
Between Terminals
Check/Cause
• Check that none of lamp bulbs is burned out or has a
contact failure.
• Bulb is faulty or poorly connected.
(1) when starter switch is ON, measure voltage between
foot brake switch terminal COM inlet wire wB and
chassis ground.
Standard voltage : 12 V or more
(2) when starter switch is ON while foot brake is
depressed, measure voltage between foot brake switch
terminal NO outlet wire Bw and chassis ground.
There is no electricity in normal condition.
• If above item (1) is OK and item (2) is NG, foot brake
switch is faulty.
(1) when starter switch is ON while foot brake is
depressed, measure voltage between stop lamp relay
terminal a inlet wire BW and chassis ground.
There is no electricity in normal condition.
(2) when starter switch is ON while foot brake is
depressed, measure voltage between stop lamp relay
terminal c inlet wire WB and chassis ground.
Standard voltage : 12 V or more
(3) when starter switch is ON while foot brake is
depressed, measure voltage between stop lamp relay
terminal f outlet wire GY and chassis ground.
Standard voltage : 12 V or more
• If above items (1) and (2) are OK and item (3) is NG, stop
lamp relay is faulty.
• Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
• If resistance is abnormal, harness is faulty.
TROUBLESHOOTING
Action
Replace each bulb.
Replace foot brake
switch.
Replace stop lamp relay.
Repair or replace
harness.
10-049